Ring sizer



D. H. BICK RING SIZER Dec. 6, 1960 2 Sheets-Sheet 1 Filed Feb. 4, 1958 Dec. 6, 1960 D. H. BICK 2,962,796

- RING SIZER Filed Feb. 4, 1958 2 Sheets-Sheet 2 INVENTOR. ZZYVZD A? 51611.

United States Patent C) RING 'SIZER David H. Bick, 917 Sheridan Ave., Bronx 51, N.Y.

Filed Feb. 4, 1958, Ser. No. 713,231

1 Claim. (Cl. 29-8) This invention relates to jewelers equipment and more particularly to a device for enlarging the finger ring.

rdinarily, the enlargement of a finger ring from a smaller size to a larger size requires a considerable expenditure of skill and care in order to prevent uneven distortion of the ring metal or actual tearing thereof. In many instances, a tapered instrument is used for this purpose such that the inside surface of the ring loses its cylindrical shape and takes on the shape of the taper of the ring sizer, thus unevenly stressing the parent metal and, in some cases, causing the ring to be uncomfortable to the wearer. It is, therefore, an object of the present invention to provide a ring sizer that is extremely simple in construction, efficient in operation and which will overcome the aforementioned difficulties.

Another object of the present invention is to provide apparatus for enlarging a finger ring in a step by step fashion in which the inside surface of the ring never loses its completely cylindrical shape and which stresses the parent metal uniformly.

Still another object of the present invention is to provide apparatus for enlarging finger rings over a wide range of sizes, without tearing the parent metal of the ring.

A more specific object of the present invention is to provide apparatus for enlarging extremely wide finger rings without damage thereto.

All of the foregoing and still further objects and advantages of this invention will become apparent from a study of the following specification, taken in connection with the accompanying drawing, wherein:

Figure 1 is a perspective view of a machine made in accordance with the present invention in operative use;

Figure 2 is an enlarged fragmentary cross sectional view taken along line 2-2 of Figure 1;

Figure 3 is a fragmentary perspective view showing the first step of enlarging a finger ring;

Figure 4 is a side elevational view illustrating the manner in which the ring is applied to the enlarging structure;

Figure 5 is a perspective view of a further step in the operation of the apparatus;

Figure 6 is a longitudinal cross sectional view of the apparatus shown in Figure 5 in a subsequent operation; and

Figure 7 is a fragmentary side elevational view, partly in section, showing the completion of a first stage enlargement of the finger ring.

Referring now to the drawing, and more particularly to Figure 1 thereof, apparatus 10 made in accordance with the present invention for enlarging a finger ring is shown to include a compact unit that includes a rigid base 12 having a rigid vertical column 13. The upper end of the column 13 terminates in a forwardly eXtending arm 15 that overlies an anvil 25 at the forward end of the base. A ram 16 in the form of a rack gear is slidably supported within the arm 15 for reciprocating vertical movement with respect to the anvil 25. A spur gear 17 in meshing engagement with the rack gear 16 is secured to a shaft 19 that is rotatably supported upon a A set screw 22 secures a chuck 23 to the lower end of the rack gear 16 in concentric relationship with the central cutout 24 of the anvil 25. Upwardly extending lugs 27 on the anvil 25 provide positioning and securing means for engagement within spaced apart openings 28, 29 in imperforate and apertured plates 30, 31 that form a part of the present apparatus and which are used in a manner hereinafter more fully described. The apertured plates 31 also have a central opening 39 which is concentric with the longitudinal bore 32 of the chuck 23.

Precision sized cylinders 35 are provided with a bevelled leading edge 36 and a terminal reduced diameter section 37 which has an outwardly protruding extension 33 integral therewith. This extension 33 is slidablysupported within the longitudinal bore 32 of the chuck 23 and secured therewithin by means of a thumb screw 34 extending diametrically therethrough. As is clearly shown in Figure 1 of the drawing, a large assortment of apertured plates 31 and sized cylinders 35 are conveniently supported within a case 38.

A separate apertured plate 31 is provided for each one of the sized cylinders 35. The cylinders 35 are of increasingly larger diameter and are so identified by means of progressively increasing numbers 43 imprinted upon the front faces thereof. Actually, these cylinders are provided in half sizes, such as size 12 and the next smaller size size 12-". Similarly, an apertured plate 31 in size 12 is provided for the size 12 cylinder 35, as is a size l2- plate provided for the slightly smaller diameter cylinder 35, size 12-.

With further reference now to Figures 3 to 7 of the drawing, the particular steps followed in enlarging a ring 40 is more clearly illustrated. Rings at different stages of sizing are designated by subscripts a, b, c, and d. The ring is first placed upon an imperfo-rate plate 30 that is placed upon the anvil 25. A sized cylinder 35 of no more than one-half size larger than the size of the ring 40 is placed in the chuck 23 and the bevelled edge 36 thereof is forced into engagement with the ring 40a, as shown in Figure 4. By then raising the chuck, as shown in Figure 5, the imperforate plate 30 is replaced with the perforate plate 31 having the central aperture 39 corresponding substantially to the diameter of the sized cylinder 35. By then forcing the ram 16 downwardly, as shown in Figure 6, by rotating the handle 21, the ring 460 is forced on to the main body portion of the sized cylinder, thus stretching it to the actual size of this cylinder. 'By continuing to lower the ram, the ring 400 is forced over the main body portion 35 of the cylinder and on to the terminal portion 37 of slightly reduced diameter, whereupon the ring 49d may be readily removed therefrom when the cylinder 35 is removed from the chuck 23. In the event that it is necessary to enlarge the ring more than one-half of a size, this process is repeated in half size stages until the proper ring size is attained. Since the sized cylinders 35 are of precisely cylindrical shape and have no tapered surfaces, the inside surface of the completely finished ring is also completely cylindrical and devoid of any excessive stresses.

While this invention has been described with particu lar reference to the construction shown in the drawing, it is to be understood that such is not to be construed as imparting limitations upon the invention, which is best defined by the claim appended hereto.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

A self contained ring sizer comprising, in combination, a substantially rigid base, an anvil secured upon said base, a column spaced from said anvil and secured upon said base, said column terminating in an arm which extends over said anvil and has a first recess which when produced is normal to said anvil, said first recess opening into a second recess, a shaft extending into said second recess, a pinion fixedto said shaft to turn therewith in said second recess, a handle fixed to said shaft outside said 'arm and its recesses to permit the manual turning of said shaft, a ram slidable in said first recess, said ram having a rack integral along one side thereof which rack mates with and is movable by said pinion, a precisely sized cylinder releasably secured to said rarn, said cylinder having a main body portion of slightly larger diameter than the diameter of the ring to be sized, a mounting member removably carried by said anvil for forcing the ring upon said cylinder, said mounting member comprising a rigid imperforate plate releasably supported upon said anvil, said main body portion ending in a sub- ;stantially beveled edge and guidingly receiving the ring to be sized and directing said ring in sliding engagement .with said main body portion of the cylinder, the end of said cylinder opposite said beveled edge defining a secentire length thereof, whereby a ring which is laid flat on the anvil supported imperforate plate has said beveled edge introduced therein thus expanding and friction gripping said ring around said main body portion so that said ring may in a subsequent operation be forced beyond said main body portion and around said section of smaller diameter, said subsequent operation utilizing an apertured plate in lieu of said imperforate plate, the aperture in said apertured plate permitting said main body portion to project therethrough while arresting said ring around the periphery thereof Where the same engages outside said aperture.

References Cited. in the file of this patent UNITED STATES PATENTS Great Britain Oct. 11, 1926 

